Update changelog for #105

Author: phil-opp

CHANGELOG.md

@@ -5,6 +5,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+- Fix: The alloc crate uses the Rust 2021 edition now ([#105](https://github.com/rust-osdev/cargo-xbuild/pull/105))
+
 ## 0.6.5 – 2021-01-25
 
 - Ensure copied Cargo.lock is writable ([#98](https://github.com/rust-osdev/cargo-xbuild/pull/98))